New summoning mechanic, Warbeasts, are added for Story, Endless Dungeon and Summoner's Onslaught.
New Action Mode added -- Summoner's Onslaught (duplicate of Onslaught Mode where the player fights alongside their Warbeast).
New Strategy Mode added -- Counterintelligence (the player runs a nation and uses their military, economy, espionage and alliances to defeat other nations).
New content added to Story Mode (New main quest arc, new sidequests, new superdungeon, new Challenges).
5 new Side Stories added (Stevant, Joe, Kaez, Fleming, Green)
Conquest has 4 new recruitable monsters (Blood Elemental for Fire, Castor for Water, Gulltoppr for Wind, Rendarachnid for Earth).
2 of Caesara's Soul Triad nodes have been changed -- 2 "Defense + 5%" nodes have become 1 "Defense + 10%" and 1 "Rebound Bonus".
Cook's Prison Break ability usage has been changed from "3 total uses per Prison Break" to "once per schedule section".
Conquest monsters on the player's side have boosted HP growth.